Vetra USB Protocol Converters can be used in many applications to connect RS-232 data sources to PCs, iMACs and other computers equipped with an USB port. The RS-232 ASCII coded data appears as keyboard input to the PC. Industrial control, point-of-sale, bar code readers, instrumentation, structured test, compatibility test, and data acquisition are some of the many areas where Vetra Protocol Converters have found effective application. The USB-335 allows the connection of additional keyboards via the on-board 2 port hub, or directly into any other USB port. When utilizing the USB-335's 2 port on-board hub, the total draw of the connected devices should not exceed 400mA. The USB-335 is powered by the PC's USB port, so no external power supply is normally required. If the on-board 2-port hub is not needed, use the Vetra USB-331 protocol and code converter. Compared to the VIP-335 Protocol Converter for PC PS/2 keyboard input, the USB-335 takes advantage of the higher input rate of the USB keyboard input. It offers a RS-232 input character rate of up to 1920 characters per second at 19,200 baud. Burst-oriented applications, such as bar code wands and bar code readers are likely to benefit from the high USB character rate.

Description: The USB-335 SmartPipe"Protocol and Code Converter allows RS-232 data to be fed directly into a USB port as keyboard data. The standard ASCII code set, common in RS-232 applications, does not correspond to the codes of the standard USB keyboard, requiring translation between ASCII and USB keyboard codes. The Vetra USB-335 Protocol Converter performs these ASCII code to USB keyboard code translations. Additional keyboards can also be connected via the on-board 2 port hub, or directly into any other USB port.The connection of a standard keyboard is optional and not necessary for the USB335 to operate.  Code Conversion for the USB-335: The USB-335 SmartPipe"translates ASCII codes to equivalent USB keyboard codes as shown in the "ASCII to USB Key Code Translation" Table. Note that the table contains more codes than the standard ASCII set. These codes have been added to bring the functionality of keyboards used with PCs and MACs into the ASCII world. Simulation of simultaneous depression of some keys is possible using the separate make and break codes for the Control, Shift, and Alt keys, both left and right. For instance, to simulate the Left Alt and F1 keys combination, hex codes 83, A0, 93 should be sent. In addition to code translation, the protocol and code converter also converts voltage and protocol from the asynchronous RS-232 protocol to the USB 2.0 compliant HID device keyboard protocol. The male DB-9 connector on the USB-335 receives RS-232 data on pin 2, and controls Clear-To-Send (CTS) on pin 7. Pin 5 is ground. For an Application Note with more information on need for CTS and throughput rates in HTML format click here, or in PDF format. The USB-335 uses the following RS-232 format: 1 start bit, 1 stop bit, 8 data bits, and no parity. There are six baud rates to choose from: 300, 1200, 2400, 4800, 9600 and 19,200 baud. For a copy of Adobe's Acrobat® Reader

Features: Designed and manufactured in the USA for use around the world Backed by a Limited 3 Year Warranty Converts RS-232 ASCII data to USB 2.0 compliant keyboard data Extra Speed Option has four times faster throughput than a standard USB keyboard Allows connection of additional keyboards or USB devices via on-board 2 port hub Custom versions available

Model: USB-335-OEM: Converts RS-232 input data to USB Keyboard codes, has on-board hub. No housing, assembled PCB only, 4.785 in H x 4.1 in W (12.15 cm x 10.4 cm).  $119.00 All prices subject to change without notice. For International Representatives click here.

Connections: A standard USB Type A-B cable, provided with the unit, is used to connect the USB-335 converter to a USB port of a PC or iMAC. The USB port can be directly on the computer or on a hub connected to the computer. A cable terminated in a standard DB-9 female connector is required to interface RS-232 data to the converter. Specifications: Dimensions for the USB-335-OEM Protocol Converter are 4.785 in H x 4.1 in W (12.15 cm x 10.4 cm). For additional dimension data, including PCB mounting hole locations click here. The USB-335-OEM is powered by the PC's USB port, so no external power supply is required unless the total current draw of devices connected to the on-board hub exceeds 400mA.  Shipping weight is less than 1 lb per unit.

Environmental	Operating Temp: Storage Temp:	5 to 104 deg. F (-15 - 40 deg. C)  -4 to 122 deg. F (-20 - 50 deg. C)
Supported Hardware	Computer: Peripherals:	Any computer with a USB port Any full or low speed USB device (into on-board hub)
The USB-335-OEM Protocol Converter uses technology protected by US Patent 7,299,309 SmartPipe is a trademark of Vetra Systems Corporation Copyright © 1995-2010 by Vetra Systems Corporation, All Rights Reserved

For user instructions for the USB-335 click here.
For user instructions in PDF format.

For a copy of Adobe's Acrobat® Reader".

All Vetra Systems products are proudly designed and manufactured in the USA for use around the world in enterprise mission-critical applications and are backed by a Limited 3 Year Warranty

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VETRA Systems Corporation 275 Marcus Blvd. Ste-J, Hauppauge, NY 11788-2022 USA Toll Free 1-800-537-9296 Tel: 631-434-3185 Fax: 631-434-3516 e-mail: sales@vetra.com